Codex Desktop exits immediately before GUI appears on Windows 11 25H2

What version of the Codex App are you using (From “About Codex” dialog)?

26.608.1337.0

What subscription do you have?

ChatGPT Plus

What platform is your computer?

Microsoft Windows NT 10.0.26200.0 x64

What issue are you seeing?

Codex Desktop does not start on Windows 11 25H2.

The AppX launch succeeds and the process is created. The application creates .codex\sqlite\codex-dev.db, but exits a few seconds later before any GUI appears.

No Codex APPCRASH entry appears in the Windows Application log.

Reinstalling Codex, resetting the package, deleting .codex, deleting the local package data, updating WebView2, and running as administrator did not resolve the issue.

What steps can reproduce the bug?

1. Install Codex Desktop from the Microsoft Store.
2. Launch Codex from the Start Menu.
3. The process starts successfully.
4. .codex\sqlite\codex-dev.db is created.
5. The application exits after a few seconds before any GUI appears.

The issue occurs every time the application is launched.

What is the expected behavior?

Codex Desktop should launch normally and display the main application window, allowing me to sign in and use the application.

Additional information

Environment:

• Windows 11 25H2
• Codex Desktop 26.608.1337.0 (Microsoft Store version)
• ChatGPT Plus subscription

Hardware:

• NVIDIA GeForce RTX 3080 Laptop GPU
• AMD Radeon Graphics
• ASUS laptop

Troubleshooting already attempted:

• Reinstalled Codex
• Reset-AppxPackage
• Deleted %USERPROFILE%\.codex
• Deleted %LOCALAPPDATA%\Packages\OpenAI.Codex_*
• Updated Microsoft Edge WebView2 Runtime
• Verified Windows App Runtime installation
• Ran Codex as Administrator

Observations:

• AppX launch succeeds
• The process is created successfully
• .codex\sqlite\codex-dev.db is created
• The application exits before any GUI appears
• No Codex APPCRASH entry appears in Windows Application logs